mirror of https://github.com/rust-lang/rust
4aba2c55e6
Start pointing to where bindings were declared when they are captured in closures:
```
error[E0597]: `x` does not live long enough
--> $DIR/suggest-return-closure.rs:23:9
|
LL | let x = String::new();
| - binding `x` declared here
...
LL | |c| {
| --- value captured here
LL | x.push(c);
| ^ borrowed value does not live long enough
...
LL | }
| -- borrow later used here
| |
| `x` dropped here while still borrowed
```
Suggest cloning in more cases involving closures:
```
error[E0507]: cannot move out of `foo` in pattern guard
--> $DIR/issue-27282-move-ref-mut-into-guard.rs:11:19
|
LL | if { (|| { let mut bar = foo; bar.take() })(); false } => {},
| ^^ --- move occurs because `foo` has type `&mut Option<&i32>`, which does not implement the `Copy` trait
| |
| `foo` is moved here
|
= note: variables bound in patterns cannot be moved from until after the end of the pattern guard
help: consider cloning the value if the performance cost is acceptable
|
LL | if { (|| { let mut bar = foo.clone(); bar.take() })(); false } => {},
| ++++++++
```
|
||
|---|---|---|
| .. | ||
| assignment-kills-loans.rs | ||
| assignment-to-differing-field.rs | ||
| assignment-to-differing-field.stderr | ||
| call-kills-loans.rs | ||
| issue-46589.rs | ||
| location-insensitive-scopes-issue-116657.nll.stderr | ||
| location-insensitive-scopes-issue-116657.polonius.stderr | ||
| location-insensitive-scopes-issue-116657.rs | ||
| location-insensitive-scopes-issue-117146.nll.stderr | ||
| location-insensitive-scopes-issue-117146.polonius.stderr | ||
| location-insensitive-scopes-issue-117146.rs | ||
| location-insensitive-scopes-liveness.rs | ||
| polonius-smoke-test.rs | ||
| polonius-smoke-test.stderr | ||
| storagedead-kills-loans.rs | ||
| subset-relations.rs | ||
| subset-relations.stderr | ||